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Thread: Tyres

  1. #11

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    TSO,

    I also thought it was a 5% tolerance but there many out there with 215/45/16 front and 255/40/17rear which measures out at 5.98% with no problem?!?

    SS
    Lexus LC500h.......New Daily run around with some saving the Planet thoughts
    Black/black 95 NSX NA with mk1 Ary exhaust....Now sold
    Red/Black 91 NSX treasure.....FI No more NA
    Silver/Pearl White/Black 1993 NSX 3.0 5 MT NSX ZAZ R-GT Twin Scroll Turbo

  2. #12
    Join Date
    Jun 2003
    Location
    Switzerland
    Posts
    1,114

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    That's becuase it's not how the 5% rule works.

    You take the ratio of the stock front tyres to stock rear tyres, ie the 'standard ratio'.

    Then with whatever tyres you get, the ratio of the new tyres has to be within 5% of the ratio of the stock tyres, ie the 'new ratio' has to be within 5% of the 'standard ratio'.
    If your fear of staying alive, outweighs the thrill of making the corner, brake.

  3. #13

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    Explained slightly better than me

    Quote Originally Posted by Kevin View Post
    That's becuase it's not how the 5% rule works.

    You take the ratio of the stock front tyres to stock rear tyres, ie the 'standard ratio'.

    Then with whatever tyres you get, the ratio of the new tyres has to be within 5% of the ratio of the stock tyres, ie the 'new ratio' has to be within 5% of the 'standard ratio'.
    ****1997 3.2 Orange / Black SOLD****

    Previously driven by.........

    Jeremy Clarkson, Tim Harvey, Richard Burns (RIP), Jason Plato, Harvey Postlethwaite (RIP), Manfred Wollgarten, Dirk Schoysman, Barrie Williams.

    Nurburgring lap time 8:38 - Honda NSX (sport auto, 08/97)

  4. #14

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    Good,

    I'll get some wider 265 rear tyres then.

    SS
    Lexus LC500h.......New Daily run around with some saving the Planet thoughts
    Black/black 95 NSX NA with mk1 Ary exhaust....Now sold
    Red/Black 91 NSX treasure.....FI No more NA
    Silver/Pearl White/Black 1993 NSX 3.0 5 MT NSX ZAZ R-GT Twin Scroll Turbo

  5. #15

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    Sorry Kevin, but without sounding a bit below the avearge IQ, then 215 45 16 (stock fronts) and 255 40 17 (upgraded rears) should be ok as SS stated? Thats on stock oems 94+ 16/17s combo.
    1999 3.2 Manual 6 Spd Coupe
    Honda's Finest Hour

  6. #16

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    Quote Originally Posted by Kevin View Post
    That's becuase it's not how the 5% rule works.

    You take the ratio of the stock front tyres to stock rear tyres, ie the 'standard ratio'.

    Then with whatever tyres you get, the ratio of the new tyres has to be within 5% of the ratio of the stock tyres, ie the 'new ratio' has to be within 5% of the 'standard ratio'.
    Just to be pedantic....do you mean 5% of the 5% (if the stock ratio is 5% for arguement sake)....ie +/-0.25% .

    215/45/16 and 245/40/17 ratio is 4.67%
    215/45/16 and 255/40/17 ratio is 6%
    225/45/16 and 255/40/17 ratio is 4.43% (current)
    225/45/16 and 265/40/17 ratio is 5.75% (?future)

    As you can see, there is more than the 5% of the stock ratio (+/- 0.25%) change yet the cars are OK?!?

    SS
    Last edited by Silver Surfer; 16-01-2008 at 01:59 AM.
    Lexus LC500h.......New Daily run around with some saving the Planet thoughts
    Black/black 95 NSX NA with mk1 Ary exhaust....Now sold
    Red/Black 91 NSX treasure.....FI No more NA
    Silver/Pearl White/Black 1993 NSX 3.0 5 MT NSX ZAZ R-GT Twin Scroll Turbo

  7. Default

    Quote Originally Posted by Kevin View Post
    I've put together these links to help in the finding of tyres for the NSX for various years.

    1991 - 1993
    Front 205/50ZR15
    Rear 225/50ZR16

    1994 - 2001
    Front 215/45ZR16
    Rear 245/40ZR17

    2002 - 2005
    Front 215/40ZR17
    Rear 255/40ZR17

    The tyres that are listed is not going to be an exhaustive list, and even though some tyres are listed may not be available.
    Do we know the recommended pressure for all these tyres, or are they all the same for the different sizes?
    Thanks

  8. #18
    Join Date
    Feb 2004
    Location
    Tavira, Portugal & Wexford, Ireland
    Posts
    75

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    Currently running 215/40/17 upfront & 265/35/18 outback on a '95 targa without any TCS or ABS problem, and well tested at track too.. Using Kumho MX which have been great on track and reasonably priced.....
    Ciaran

  9. #19

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    Quote Originally Posted by madras View Post
    Do we know the recommended pressure for all these tyres, or are they all the same for the different sizes?
    Thanks
    I have always been told to use the same .... however, if someone know different, ie by checking their manuals? please let us know.

    regards,
    Senninha

    'Too many manufacturers today are obsessed with lap times and power outputs at the expense of emotion and fun' Colin Goodwin

    S2 is signed by the NSX Project Leader Shigeru Uehara

  10. #20

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    Just had 255 40 17 GY F1 GSD3s rear tyres fitted, they stated their guide for that particular tyre & size, recommends 33 PSI, but when I questioned this, they stated this is only advisory!? My previous oem 245 BS RE010 was 40 PSI, but I know when you go wider, it normally means less PSI is required. Is 33 psi about right guys for those with GY 255s or any other 255 tyre brands? Cheers
    Last edited by TheSebringOne; 02-02-2008 at 10:23 PM.
    1999 3.2 Manual 6 Spd Coupe
    Honda's Finest Hour

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